Yes, it has been dealt with.

I see that you've done as I asked, %PCRank. Obviously, this alone won't bring down Mithras, but you've contributed just a bit more to his steadily growing list of issues. I'll let you know once we're ready to strike again. Meanwhile, I have more chores for you. Oh, and here's your reward.

You say you ambushed the caravan? Where are the mining tools you were supposed to steal? Go get them and return to me, %PCRank.

The caravan won't wait for you forever, %PCRank. You better get going.

If you're quick enough, you will find the caravan on the road from Llothanis to Ranyon-ruhn. Your job is to swoop in, kill the caravaner and steal the mining tools.